And please read my posts thoroughly because when you say "ailerons are in reverse and rudder isnt, not in my book" then you are not reading the full post. I clearly state the rudder is also in reverse so read the whole post.
OK, to start with, I don't know what you mean by "the controls are reversed." Are you simply referring to the fact that the plane is heading toward you, so your right is the plane's left? I wouldn't ever let a beginner try a landing until he'd learned to deal with that problem. A lot of practice flying straight toward yourself is a good way to prepare for landing.
Next, if "the controls are reversed," why would it be better to use the "reversed" rudder than the "reversed" ailerons? Your apparent belief that it's easier to steer with rudder because of this reversal is why I assumed you thought the rudder wasn't reversed. "Move the stick toward the low wing to level t he plane" is usually one of the first things people learn about flying toward themselves, so it seems to me that aileron use would be easier.
There is no difference between full-scale aerodynamics and model aerodynamics; all airplanes are subject to the same laws of physics. I cited "Stick and Rudder" for a couple of basic propositions that are true of both models and full-scale planes, and which are often misunderstood by both model and full-scale pilots: (1) the plane feels no wind in a steady breeze, except for the relative wind caused by its own motion through the air, and (2) the rudder does not steer the plane (except indirectly, by inducing a bank in a plane with dihedral). Do you deny that these principles apply to models?
If you find slipping to land easier than crabbing, by all means slip. But few other people do.